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| 用苦瓜提取液还原制备纳米银的研究 |
| Study on Preparation of Nano-silver by Reduction of Momordica Charantia Extracts |
| Received:January 03, 2020 |
| DOI： |
| 中文关键词: 纳米银 植物提取液 制备 形貌表征 反应机理 |
| 英文关键词: nano-silver plant extract preparation morphology characterization reaction mechanism |
| 基金项目:国家自然科学基金(31870565) |
| Author Name | Affiliation | E-mail | | SUN He-yuan | College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China | 2955275594@qq.com | | WANG Xiao-ju | College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China | | | CHEN Xi | College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China | | | WANG Zhi-guo | College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China | | | LIU Zhu-lan | College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China | | | WANG Qi | College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China | wangqi@njfu.edu.cn |
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| 中文摘要: |
| 分别以中国种和印度种苦瓜的提取液为还原剂、硝酸银为前驱体制备纳米银颗粒，并采用紫外可见光谱(UV-Vis)、红外光谱(FTIR)、X射线衍射(XRD)、和透射电镜(TEM)进行表征。结果表明，当硝酸银浓度为10 mmol/L时，制备得到平均粒径最小为8.72和7.46 nm的球形纳米银颗粒。制备反应机理为类黄酮作为还原剂，通过失去H+由烯醇结构变为醌型结构来还原Ag+获得Ag0，蛋白质及其它三萜类化合物起保护剂作用。苦瓜提取液种类对纳米银的粒径、形貌、分散性及均匀性等总体影响不大。 |
| 英文摘要: |
| Nano-silver particles were prepared with Chinese and Indian momordica charantia extracts as the reducing agent and silver nitrate as the precursor. Their properties were characterized by UV-Vis, FTIR, XRD and TEM. When the concentration of silver nitrate is 10 mmol/L, the prepared spherical nano-silver particles have the smallest average particle size of 7.46 and 8.72 nm for the two types of reducing agents, respectively. Flavonoids, proteins and other tricholasts in the momordica charantia extracts were used as reducing agents and protective agents during the reaction process. The reaction mechanism was that flavonoids were reduced by losing H+ from anoleol structure to a pyridine-type structure to reduce Ag+. The type of momordica charantia extracts has little effect on size, morphology, dispersion and uniformity of nano-silver particles. |
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